Ticket #1627: grep_filter_driver.cpp

#include "grep.hpp"

#include <boost/iostreams/device/file.hpp>
#include <boost/iostreams/filtering_stream.hpp>
#include <iostream>

int main()
{
        boost::iostreams::grep_filter filter("main");

        {
                boost::iostreams::filtering_istream is;

                is.unsetf(std::ios::skipws);
                is.push(filter);
                is.push(boost::iostreams::file_source("main.cpp"));

                std::copy(std::istream_iterator<char>(is),
                                  std::istream_iterator<char>(),
                                  std::ostream_iterator<char>(std::cout));

        }

        {
                boost::iostreams::filtering_ostream os;

                os.push(filter);
                os.push(boost::iostreams::file_sink("test.txt"));

                std::ifstream f("main.cpp");
                f.unsetf(std::ios::skipws);

                std::copy(std::istream_iterator<char>(f),
                                  std::istream_iterator<char>(),
                                  std::ostream_iterator<char>(os));
        }
}